Defensive publication



DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 O.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Office makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED JANUARY 27, 1970 T870,021 LIGHT SENSITIVE CHALCONE POLYESTERS Thomas Matthews Laakso, Kodak Park, Rochester, N.Y.

14650; Harold Lee Van Nice, 58A N. Fairway, Pullman, Wash. 99163; and Jack Leland Redavat Williams, Kodak Park, Rochester, N.Y. 14650 Filed Jan. 3, 1969, Ser. No. 788,943 Int. Cl. (308g 33/10 U.S. Cl. 260-47 No Drawing. 21 Pages Specification Light sensitive polymers are provided having repeat- G is the divalent residue of a dihydric alcohol. The polying units of the formula: esters thus constitute the polyester reaction product of a 0 o o i-R,-o OH=C C=CH o-'Rl-C 0GO- wherein R is a lower alkylene radical of from 1 to 5 dihydric alcohol with a his chalcone acid having the carbon atoms, preferably 1 to 2 carbon atoms, R is hyformula:

i=CHO-Rz&00fi

0 R2 HOOaRPOQCH or with a his chalcone ester having the formula:

wherein R is a lower alkyl radical of from 1 to 5 carbon drogen or lower alkoxy having from 1 to 5 carbon atoms, atoms, preferably methyl or ethyl. The polyester is P R3 and 4 are each hydrogen or lower alkyl 0f 1 t0 5 erably obtained by an ester interchange reaction between carbon atoms or together constitute the atoms necessary the alcohol and the estejr F fonventloflal eqmprqent and catalysts such as tltanium lsopropoxlde, strontium to wmPlete carbocychc ring of from 4 to 7 oxide, magnesium-titanium esters, etc. The polyester may bon atoms, which ring may be substituted for example, also be 3 60130131651, in which case at least 10 111016 P cent of the acid residues in the polyester are the bls chalcone residues.

with lower alkyl groups of from 1-5 carbon atoms, and 

